Hey,
I believe person A sends you a recruit invite, you accept, make an account, buy the battle chest. You get one month game time, and you and person A (if leveling together) get tripple exp for as many characters you wanna level to 80, in a month. If you're looking for someone to recruit you, I'm keen to do it as I've been thinking of leveling some new alts.
P.s. I'm not one of those money maker guys, I'm a legit wow player who plays on Barthilas Horde. (US).